Sb electronics presents door guards that are battery-operated [2 pen-lite cells] security devices that alerts by an alarm, when the door is opened. These gadgets are very simple devices and can easily be mounted on doors, sliding doors, cubpoards, safe doors, gates, rolling shutters, vehicle doors, windows, etc. An override switch is also provided to swtich off the units when not; required making them ideal products to check intruders.
